Personality Type Compatibility: Compare Any Two of the 16 Types

How the personality type compatibility calculator works

This calculator compares two four-letter personality types, such as ENFP and ISTJ, and turns the comparison into something you can read: a compatibility score, a six-area radar chart, a side-by-side look at each type’s cognitive functions, a ranking of all 16 pairings and short reports for romantic, friend and coworker relationships. It runs on fixed rules that are written out below, so the same two types always give the same result, and it does not matter which of the two you pick first. It is meant for self-reflection, conversation and entertainment. It is not a diagnosis, a hiring tool or a way to decide whether a relationship should continue.

How to use it in three steps

1. Choose your type. Open the first drop-down and pick your four-letter code. If you already know your MBTI® type from another test, use that one. If you are unsure, take the Personality Type Test first and come back with your result.
2. Choose their type. Pick the other person’s code in the second drop-down. You can also pick the same type twice to see how two people of one type tend to fit together.
3. Pick a relationship and press See compatibility. Choose Romantic, Friends or Coworkers. The score, the reasons behind it and the reports appear straight away. You can switch the relationship tab or tap any type in the ranking without starting over.

How the score is calculated

The score is a plain sum of points, and every line of it is listed under “Why this score?” on the result card. The calculation starts at 20 and adds points for each of the four letter pairs, depending on whether your two letters match or differ.

The tool then looks at the two middle letters, which together form one of four temperament groups: NF, NT, ST or SF. If both people are in the same group, add 8. If the groups differ but both people share the same information letter (both N or both S), add 6. If they differ there but share the same decision letter (both T or both F), add 5. If they share neither, add 3. The total is kept between 20 and 90.

Score = 20 + S/N points + T/F points + E/I points + J/P points + temperament bonus

A worked example. Take ENFP and INTJ. E and I differ, so +12. Both are N, so +20. F and T differ, so +8. P and J differ, so +7. Their groups are NF and NT, which share the N, so +6. Add the starting 20 and the total is 20 + 12 + 20 + 8 + 7 + 6 = 73.

Two details are worth knowing. First, the two types are put in alphabetical order before scoring, so ENFP with INTJ and INTJ with ENFP always give exactly the same number. Second, a difference in energy (E/I) earns slightly more than a match, 12 points against 9. That is a deliberate choice by the tool’s author: one extravert and one introvert are treated as a pairing that can balance each other. These weights are Toolssok’s own design, not the finding of a research study.

Because of how the points add up, scores do not actually spread from 20 to 90. Across all 16 types the results fall between 57 and 86, in ten distinct steps. The top score, 86, goes to pairs that differ only in E/I, such as ENFP and INFP. The lowest, 57, goes to pairs that match only in E/I, such as ENFP and ESTJ. Two people of the same type always score 83. If you average each type across all 16 possible partners, every type lands on exactly 71.5, so no type is a better or worse partner overall.

How to read your score

The score is sorted into four bands. The label is a conversation starter, not a prediction.

A score in the 60s does not describe a worse relationship than a score in the 80s. It describes a bigger gap in habits, and a bigger gap is something two people can talk about. The ranking at the bottom of the result card shows how your chosen partner compares with the other 15 types, and the note under it names the top three and the lowest-scoring pairing.

The four preference pairs in plain words

Each four-letter code is made of four choices. Each pair describes a tendency, not an ability, and most people use both sides depending on the situation.

This calculator gives the most weight to the information and decision pairs, because it treats those two as shaping how people talk and how they settle disagreements. Energy and lifestyle matter more for how an ordinary day together feels.

Cognitive functions in plain words

Beneath the four letters, type theory describes eight cognitive functions. A cognitive function is a habitual way of taking in information or making a decision, and each one is either extraverted (aimed at the outer world) or introverted (aimed at inner reasoning). Every type uses four of the eight in a fixed order. The first is the dominant function, the one that feels most natural. Next come the auxiliary and tertiary functions. The last is the inferior function, the least developed one, which tends to show up clumsily when you are tired or stressed. ENFP, for example, uses Ne, Fi, Te and Si in that order, while ISTJ uses Si, Te, Fi and Ne.

The calculator lays the two stacks side by side. A cell outlined in green holds a function that also appears somewhere in the other person’s stack. The symbol between two rows is an equals sign when both people have the same function in the same position, an approximately-equals sign when the function appears in the other stack but in a different position, and a dot when it does not appear there at all.

The six relationship structures

By comparing the stacks, the result gives your pairing one of six named structures. They are Toolssok’s own way of sorting the possibilities, and they explain why two pairs with the same score can feel very different.

In this model two types share zero, two or four functions, never one or three. When the structure is Shared Functions, the badge on the result card tells you whether the number is two or four.

The six areas on the radar chart

The radar chart splits a pairing into six areas. Each area is scored from 25 to 96 by its own formula over the letters and the function stacks. The dashed line marks the average of all 256 possible ordered pairings, so a point outside the line is above average for that area.

• Talk leans most on the S/N pair, then T/F and E/I, with a small bonus for every shared function.
• Values leans on T/F, then on the temperament group, then on S/N.
• Conflict leans on T/F and J/P, and adds points for each Feeling type in the pair and for the Growth Complement structure.
• Rhythm leans on J/P and E/I, with small contributions from S/N and from having exactly one extravert.
• Bond rises with the number of Feeling types in the pair, plus E/I and T/F matches and a small bonus when both people are intuitive.
• Growth rises with the number of letters that differ, with extra points for the Growth Complement, Mirror Complement and Interlocking Gears structures and a small deduction for identical types.

That is why Growth often moves the opposite way from Talk and Values: the more alike two people are, the easier conversation gets, and the less new material they bring each other.

Frequently asked questions

Related tools

Not sure of your own type yet? Take the Personality Type Test and come back with your result. For a very different style of match reading from Korean tradition, try the Saju Compatibility calculator, or look up your animal sign in the Korean Zodiac Calculator. If you are planning a group activity, the Random Team Generator splits a list of names into fair teams. More tools like this are in Fun & Games.

This independent tool is not affiliated with or endorsed by The Myers-Briggs Company. MBTI® is a registered trademark of The Myers-Briggs Company. Results are for self-reflection and entertainment, not for hiring, diagnosis or relationship decisions.